public virtual bool range(IObs ob, double range)
{
return(ob.ditanceSq(this) < range);
}
public void unsubscribe(IObs observer)
{
observers.Remove(observer);
observer.setObservable(null);
}
public Observable2(IObs obj)
{
obj.Subscribe(this);
}
public void subscribe(IObs observer)
{
observers.Add(observer);
observer.setObservable(this);
}
